EP3737114A1 - Lautsprecheranpassungsverfahren und elektronische vorrichtung - Google Patents

Lautsprecheranpassungsverfahren und elektronische vorrichtung Download PDF

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Publication number
EP3737114A1
EP3737114A1 EP19216728.6A EP19216728A EP3737114A1 EP 3737114 A1 EP3737114 A1 EP 3737114A1 EP 19216728 A EP19216728 A EP 19216728A EP 3737114 A1 EP3737114 A1 EP 3737114A1
Authority
EP
European Patent Office
Prior art keywords
speakers
speaker
microphone
frequency responses
distance information
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP19216728.6A
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English (en)
French (fr)
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EP3737114B1 (de
Inventor
Po-Jen Tu
Jia-Ren Chang
Kai-Meng Tzeng
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Acer Inc
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Acer Inc
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Publication date
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Publication of EP3737114A1 publication Critical patent/EP3737114A1/de
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Publication of EP3737114B1 publication Critical patent/EP3737114B1/de
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04S—STEREOPHONIC SYSTEMS 
    • H04S7/00—Indicating arrangements; Control arrangements, e.g. balance control
    • H04S7/30—Control circuits for electronic adaptation of the sound field
    • H04S7/301—Automatic calibration of stereophonic sound system, e.g. with test microphone
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R3/00—Circuits for transducers, loudspeakers or microphones
    • H04R3/04—Circuits for transducers, loudspeakers or microphones for correcting frequency response
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R3/00—Circuits for transducers, loudspeakers or microphones
    • H04R3/12—Circuits for transducers, loudspeakers or microphones for distributing signals to two or more loudspeakers
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R5/00—Stereophonic arrangements
    • H04R5/02—Spatial or constructional arrangements of loudspeakers
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R5/00—Stereophonic arrangements
    • H04R5/04—Circuit arrangements, e.g. for selective connection of amplifier inputs/outputs to loudspeakers, for loudspeaker detection, or for adaptation of settings to personal preferences or hearing impairments
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04S—STEREOPHONIC SYSTEMS 
    • H04S1/00—Two-channel systems
    • H04S1/007—Two-channel systems in which the audio signals are in digital form
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04S—STEREOPHONIC SYSTEMS 
    • H04S2400/00—Details of stereophonic systems covered by H04S but not provided for in its groups
    • H04S2400/13—Aspects of volume control, not necessarily automatic, in stereophonic sound systems
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04S—STEREOPHONIC SYSTEMS 
    • H04S2400/00—Details of stereophonic systems covered by H04S but not provided for in its groups
    • H04S2400/15—Aspects of sound capture and related signal processing for recording or reproduction

Definitions

  • the present disclosure relates to a speaker adjusting technique, and more particularly to a speaker adjustment method for a plurality of speakers and an electronic device using the same.
  • an embodiment of the present disclosure provides a speaker adjustment method and an electronic device using the same, which can well adjust the outputs of a plurality of speakers by using one microphone, so that the plurality of speakers can reach a target sound field during broadcasting.
  • the speaker adjustment method of the embodiment of the present disclosure is for adjusting a plurality of speakers.
  • the speaker adjustment method includes the steps of: respectively obtaining a plurality of frequency responses of the plurality of speakers by using one microphone; obtaining distance information between the microphone and the plurality of speakers; and adjusting the outputs of the plurality of speakers according to the plurality of frequency responses and the distance information.
  • the electronic device of the embodiment of the disclosure includes a plurality of speakers, a microphone, and a processor.
  • the plurality of speakers are configured to respectively broadcast a frequency scanning signal.
  • the microphone is configured to respectively receive a plurality of audio signals when the plurality of speakers broadcast the frequency scanning signal.
  • the processor is coupled to the plurality of speakers and the microphone, and configured to: obtain a plurality of frequency responses of the plurality of speakers according to the plurality of audio signals; obtain distance information between the microphone and the plurality of speakers; and adjust the outputs of the plurality of speakers according to the plurality of frequency responses and the distance information.
  • the speaker adjustment method and the electronic device using the same use the same microphone to obtain a plurality of frequency responses of a plurality of speakers, and then adjust the outputs of the plurality of speakers according to the frequency responses.
  • the distance information between the microphone and the plurality of speakers is also taken into consideration, such that the speaker adjustment method does not need to take into account the individual differences between the microphones in mass production.
  • the speaker adjustment method of the embodiment of the present disclosure adjusts a plurality of speakers by using a microphone. Since the distances between the microphone and the plurality of speakers might be different, and the different distances might cause the volume outputted by the speakers received by the microphone to have different attenuation, the speaker adjustment method in the embodiment of the present disclosure takes into account the distance between the microphone and the speakers to adjust the outputs of the speakers. Specifically, when using a single microphone to adjust the plurality of speakers, there is no need to take the individual differences between multiple microphones into consideration, and good adjustment result can be obtained by only taking into account the distances between the microphone and the plurality of speakers.
  • the speaker adjustment method will be described with an electronic device provided with a plurality of speakers and a single microphone.
  • the present disclosure is not limited thereto, and the proposed speaker adjustment method can also be applied to other audio systems or electronic systems such as a movie theater, a home theater and so on.
  • FIG. 1A is a schematic block view of an electronic device according to an embodiment of the disclosure.
  • an electronic device 100 includes, for example, a processor 110, a first speaker 120_1, a second speaker 120_2, and a microphone 130, wherein the first speaker 120_1, the second speaker 120_2, and the microphone 130 are coupled to the processor 110.
  • a processor 110 a first speaker 120_1, a second speaker 120_2, and a microphone 130, wherein the first speaker 120_1, the second speaker 120_2, and the microphone 130 are coupled to the processor 110.
  • two speakers are exemplified in the present embodiment, but the present disclosure provides no limitation to the number of the speaker.
  • the processor 110 is, for example, a dual core, quad core, or eight core central processing unit (CPU), a system-on-chip (SOC), an application processor, a media processor, a microprocessor, a digital signal processor, a programmable controller, an application specific integrated circuit (ASIC), a programmable logic device (PLD) or other similar device or a combination of these devices, the present disclosure is not limited thereto.
  • CPU central processing unit
  • SOC system-on-chip
  • an application processor a media processor
  • a microprocessor a digital signal processor
  • ASIC application specific integrated circuit
  • PLD programmable logic device
  • the positions of the first speaker 120_1 and the second speaker 120_2 in the following description refer to the sound outlet positions of the left channel and the right channel of the electronic device 100, respectively
  • the position of the microphone 130 refers to the position of the sound outlet of the electronic device 100.
  • FIG. 1B is a schematic view of an electronic device according to an embodiment of the disclosure.
  • the electronic device 100 is, for example, a lifting cover electronic device, and includes an upper cover 140 and a lower base 150 that can be opened/closed with respect to each other.
  • the upper cover 140 can be configured to set a display panel (not shown) of the electronic device 100
  • the lower base 150 can be configured to set the processor 110, the memory (not shown) and so on of the electronic device 100, the disclosure is not limited thereto.
  • the first speaker 120_1 and the second speaker 120_2 are symmetrically fixed to the lower base 150 of the electronic device 100.
  • the microphone 130 is fixedly disposed on the upper cover 140 of the electronic device 100.
  • the first speaker 120_1 and the second speaker 120_2 are symmetrically disposed, and the processor 110 is responsible for performing a speaker adjustment method to adjust the first speaker 120_1 and/or the second speaker 120_2 so that the sound field of the electronic device 100 is maintained in the middle.
  • the distance d1 between the microphone 130 and the first speaker 120_1 is different from the distance d2 between the microphone 130 and the second speaker 120_2 (for example, the microphone 130 is not located on the center line of the upper cover 140).
  • the present disclosure is not limited thereto, and in some embodiments, the distance d1 between the microphone 130 and the first speaker 120_1 and the distance d2 between the microphone 130 and the second speaker 120_2 may also be the same (for example, the microphone 130 is located on the center line of the upper cover 140).
  • FIG. 2 is a flow chart of a speaker adjustment method according to an embodiment of the present disclosure.
  • the speaker adjustment method of the present embodiment is adapted to the electronic device 100 in FIG. 1A and FIG. 1B , and therefore will be described below with reference to the electronic device 100.
  • the speaker adjustment method of this embodiment can also be adapted to other audio systems or electronic systems, and is not limited to the electronic device 100.
  • a plurality of frequency responses of a plurality of speakers are respectively obtained by using a microphone.
  • each speaker will separately broadcast a frequency scanning signal, and the microphone respectively receive the audio signals when each of the speakers broadcasts the frequency scanning signal to obtain the frequency response of each speaker.
  • the frequency scanning signal is, for example, a signal of which the amplitude does not change but the frequency changes, and those having ordinary skill in the art can understand the meaning of the frequency scanning signal, so related descriptions are not incorporated herein.
  • the processor 110 first broadcasts the frequency scanning signal through the first speaker 120_1.
  • the microphone 130 receives the audio signal when the first speaker 120_1 broadcasts the frequency scanning signal, so the processor 110 can obtain the first frequency response of the first speaker 120_1.
  • the processor 110 broadcasts the same frequency scanning signal through the second speaker 120_2.
  • the microphone 130 receives the audio signal when the second speaker 120_2 broadcasts the frequency scanning signal, so the processor 110 can obtain the second frequency response of the second speaker 120_2.
  • the volume influence ratio of the audio signals received by the microphone 130 from the first speaker 120_1 and the second speaker 120_2 is proportional to log (d1/d2). That is, the first frequency response and the second frequency response are associated with the distance d1 and the distance d2, so if the speaker is adjusted directly according to the first frequency response and the second frequency response, such adjustment will result in different adjustment results due to the difference in the positions of the microphone 130.
  • step S220 distance information between the microphone and the plurality of speakers is obtained.
  • information about the distance between the microphone and the plurality of speakers such as the distance ratio between the microphone and each speaker, or the absolute distance between the microphone and each speaker, etc., the disclosure is not limited thereto.
  • the processor 110 can obtain the distance d1 and the distance d2, or obtain the distance ratio d1/d2 between the distance d1 and the distance d2 according to the design of the electronic device 100, that is, the positions where the first speaker 120_1, the second speaker 120_2, and the microphone 130 are disposed on the electronic device 100.
  • the closing angle i.e., the angle between the upper cover 140 and the lower base 150
  • the processor 110 may first obtain the closing angle, and then calculate the distance information about the microphone 130, the first speaker 120_1 and the second speaker 120_2 according to the closing angle.
  • the present disclosure provides no limitation to the specific way of obtaining distance information.
  • the electronic device 100 may also be provided with a distance sensor (not shown) for measuring the distance d1 between the microphone 130 and the first speaker 120_1 and the distance d2 between the microphone 130 and the second speaker 120_2.
  • the processor 110 can directly obtain the distance information through the distance sensor.
  • step S230 the plurality of speakers are adjusted according to the obtained plurality of frequency responses and distance information.
  • the plurality of frequency responses obtained in step S210 are associated with the distance between the microphone and the plurality of speakers, and thus the distance information between the microphone and the plurality of speakers obtained in step S220 should also be taken into consideration when the plurality of speakers are adjusted according to the frequency responses.
  • the distance information obtained by the processor 110 in step S220 is, for example, a distance ratio d1/d2.
  • the processor 110 can calibrate the first frequency response and the second frequency response into a first equidistant frequency response and a second equidistant frequency response according to the volume influence ratio log (d1/d2) of the audio signal received by the microphone 130 from the first speaker 120_1 and the second speaker 120_2.
  • the first equidistant frequency response and the second equidistant frequency response respectively represent the frequency responses of the first speaker 120_1 and the second speaker 120_2 respectively after the volume influence caused by the difference in the distances between the microphone 130 and the first speaker 120_1 and the second speaker 120_2 is eliminated.
  • the processor 110 may, for example, increase the magnitude (decibel) of the first frequency response and/or reduce the magnitude (decibel) of the second frequency response according to the volume influence ratio log (d1/d2), thereby eliminating the volume influence caused by the difference in the distances between the microphone 130 and the first speaker 120_1 and the second speaker 120_2.
  • FIG. 3 is a schematic view of a frequency response according to an embodiment of the disclosure.
  • FIG. 3 illustrates a first equidistant frequency response L', a second equidistant frequency response R', and a target frequency response RT.
  • the first equidistant frequency response L' and the second equidistant frequency response R' are still different, and such phenomenon might be caused by a difference in the mechanical design between the first speaker 120_1 and the second speaker 120_2 or the element layout of the electronic device 100 and so on. Therefore, the processor 110 can adjust the outputs of the plurality of speakers according to the first equidistant frequency response L' and the second equidistant frequency response R' thereby adjusting the sound field symmetry of the electronic device 100.
  • the processor 110 determines, for example, a target frequency response RT to adjust the outputs of the first speaker 120_1 and the second speaker 120_2 according to the determined target frequency response RT, thereby adjusting the first equidistant frequency response L' and the second equidistant frequency response R' toward the target frequency response RT.
  • the target frequency response RT may be relevant or irrelevant to the plurality of frequency responses obtained in step S210.
  • the target frequency response RT can be predefined by the user.
  • the target frequency response RT may be determined by the processor 110 according to the first equidistant frequency response L' and the second equidistant frequency response R'.
  • the processor 110 may select one of the first equidistant frequency response L' and the second equidistant frequency response R' as the target frequency response RT.
  • the processor 110 may calculate the target frequency response RT by means of the average and/or moving average according to the first equidistant frequency response L' and the second equidistant frequency response R'.
  • the present disclosure provides no limitation to the specific determining method of the target frequency response RT, and those having ordinary skill in the art can implement the determining method depending on the needs.
  • the processor 110 when adjusting the outputs of the plurality of speakers, the processor 110 adjusts, for example, an equalizer (EQ) corresponding to the first speaker 120_1 and the second speaker 120_2 to adjust the first equidistant frequency response L' and the second equidistant frequency response R' toward the target frequency response RT.
  • EQ equalizer
  • the electronic device 100 can have a symmetric and balanced sound field when broadcasting audio through the first speaker 120_1 and the second speaker 120_2.
  • the present disclosure provides no limitation to the specific adjustment items when adjusting the outputs of the plurality of speakers.
  • the outputs of the speakers can also be adjusted by means of Fast Fourier Transform (FFT) or wavelet transform.
  • FFT Fast Fourier Transform
  • wavelet transform wavelet transform
  • the speaker adjustment method and the electronic device using the same described in the embodiments of the present disclosure use the same microphone to obtain a plurality of frequency responses of a plurality of speakers, and then adjust the outputs of the plurality of speakers according to the frequency responses.
  • the distance information between the microphone and the plurality of speakers is taken into consideration, such that the speaker adjustment method does not need to take into account the individual differences between the microphones in mass production.

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
  • Health & Medical Sciences (AREA)
  • General Health & Medical Sciences (AREA)
  • Otolaryngology (AREA)
  • Multimedia (AREA)
  • Circuit For Audible Band Transducer (AREA)
EP19216728.6A 2019-05-07 2019-12-16 Verfahren zur einstellung von lautsprechern und elektronische vorrichtung dieses verwendend Active EP3737114B1 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
TW108115706A TWI757600B (zh) 2019-05-07 2019-05-07 揚聲器調整方法與使用此方法的電子裝置

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Publication Number Publication Date
EP3737114A1 true EP3737114A1 (de) 2020-11-11
EP3737114B1 EP3737114B1 (de) 2023-03-15

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US9219460B2 (en) 2014-03-17 2015-12-22 Sonos, Inc. Audio settings based on environment
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US10372406B2 (en) 2016-07-22 2019-08-06 Sonos, Inc. Calibration interface
JP2021196582A (ja) * 2020-06-18 2021-12-27 ヤマハ株式会社 音響特性の補正方法および音響特性補正装置
US11711061B2 (en) 2021-01-21 2023-07-25 Biamp Systems, LLC Customized automated audio tuning
CN112511962B (zh) * 2021-02-01 2021-05-18 深圳市东微智能科技股份有限公司 扩声系统的控制方法、扩声控制装置及存储介质
CN114007165B (zh) * 2021-10-29 2022-06-28 歌尔光学科技有限公司 一种电子设备及其远场消声自校准方法和系统
CN115426589A (zh) * 2022-11-03 2022-12-02 荣耀终端有限公司 一种音频信号的调节方法及电子设备

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Also Published As

Publication number Publication date
TW202042567A (zh) 2020-11-16
EP3737114B1 (de) 2023-03-15
TWI757600B (zh) 2022-03-11
US10904691B2 (en) 2021-01-26
US20200359153A1 (en) 2020-11-12

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